This is the 745th most frequent Macedonian word.
американската
"Американската" means "the American" (feminine singular definite form) in English.
In this sentence, 'американската' is used as an attributive adjective to describe 'culture' (култура), referring to something associated with America.
Американската култура е богата и разновидна.
American culture is rich and diverse.
Here, 'американската' qualifies 'book' (книга) as a specific item modified as being American, serving as a definite adjective.
Го купив американската книга која ми ја предложи.
I bought the American book that you recommended to me.
In this context, 'американската' describes 'music' (музика), again functioning as an adjective to point out its American origin or style.